#create executables of commands implementedcc -o cat cat.ccc -o cp cp.ccc -o date date.ccc -o decho decho.ccc -o ln ln.ccc -o rename rename.ccc -o rm rm.ccc -o wc wc.ccc -o sleep sleep.ccc -o ls ls.ccc -o man man.ccc -o mkdir mkdir.ccc -o pwd pwd.ccc -o rmdir rmdir.ccc -o fattr fattr.ccc -o shell shell.c